David hall eice



(No Model.)

D. H. RICE.

REVOLVING FIRE ARM. No. 366,794. Patented July 19, 1887.

according to my invention.

UNITED STATES PATENT OFFICE.

DAVID HALL RICE, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO THE MARLIN FIRE-ARMS COMPANY, OF NEW HAVEN, CONNECTICUT.

SPECIFICATION forming part Of Letters Patent No. 366,794, dated July 19, 1887.

Application filed March EP, 1887. Serial No.232fi93.

Toall whom. it may concern:

Be it known that I, DAVID HALL RICE, of Brookline, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Revolving Fire-Arms, of which the following is a specification.

My invention relates to revolving fire-arms; and it consists in certain new and useful constructions and combinations of the several parts thereof, substantially as hereinafter described and claimed. p

In the drawings, Figure 1 is a side elevation of aportion of arevolvingfire-arm constructed Fig. 2 is a rear end view of the revolving cylinder. Fig. 3 is a side view of the same.

B is the barrel of the arm, provided with a rearward extension, b, over the cylinder 0, which is locked by the latch b to the frame F. The barrel B also has a projection, P, on its lower side, by means of which it is pivoted to the frame by the pivot 1) forward of the cylinder. The cylinder 0 revolves upon a pin fixed in the projection P and extending rearwardl y therefrom parallel with the lower face of extension b,and at the proper distance therefrom, as shown in dottedlines in Fig. 1. All of these parts are of the usual and well-known construction and are well understood, and furvsecuring the cylinder 0 uponthe axial pin, on

which it rotates in such manner that it is less readily detached accidentally than heretofore, and so that'dirt and gases cannot foul up the connecting mechanism. To the front end of the cylinder 0 is attached a tubular extension, 0, concentric with the cylinder. On the outward end of this extension is formed an annular collar, 0, projecting radially outward beyond the extension all around. Through this collar, and to the depth to which it projects beyond the extension, I form a groove, 0 of V contour having its ends opening outward through the edges of collar 0' and its point in the central portion of the collar and project ing in the direction in which the cylinder 0 revolves around its axial pin when the arm is being discharged. 7

On the lower side of the barrel B of the arm (No model.)

and pass through the V-groove a. of the cylinder-extension. When it is desired to seat the cylinder in place in the arm, it is slipped upon its axial pin and its extension-collar 0'. brought against the pin e. By then turning the cylinder backward the pin enters the V-groove and Go traverses the same to the point of the groove, when by reversing the motion of the cylinder and still pressing it upon its axial pin the pin e traverses the other branch of the V-groove and passesbehind the collar c-, thus securing the cylinder upon its axial pin when the barrel is unlocked from the frame. When thus secured, any revolution of the cylinder in a forward directionwill cause the pin e to pass by the V-groove without entering it, while any 7c revolution of the cylinder backward will only cause it to enter one branch of the groove, and cannot detach it from its axial pin, thus providing greater security against the accidental escape of the cylinder from the arm, since it is manifest that it can only be removed by revolving it alternately in one direction and the other, and at the same time so pressing upon it as to cause the pin e to enter the second branch of the V-groove after it has passed through the first branch to the point of the same. When the pin 0 and V-groove c are nicely proportioned and fitted to each other, it will be found a diflicult matter to cause the pinto pass through the groove and allow the escape of the cylinder unless by design.

To further guard against the accidental escape'of the cylinder, I have shown in Fig. 3, as an addition to the invention, a spring, a,

set firmly into the collar c,"so that its free end 0 to allow the pin e to pass by it from one branch 9 5 of the V-groove into the other, and vice versa; but should the pin enter either branch of the V-groovc the spring will always keep it from entering the other branch until the requisite pressure transversely of it has been brought 10o to bear uponit to press the point of the spring to one side and allow the pin to pass by it. This pressure must be brought to bear while the cylinder is firmly held from rotation, because if the cylinder be allowed to, rotate it will crowd ihe'pin 0 toward the heel of the spring a and prevent the spring being pushed aside by any reasonable force exerted upon it.

What I claim as new and ofmy invention is- 1. The combination of the barrel B, the axial cylinder-pin extending rearwardly therefrofh, the pin e, projecting from said barrelat right angles to the axial pin, the cylinder 0, revolving upon said axial pin, and the tubular forward extension,c,concentric with the cylinder and provided upon its end with the-collar c, and the groove 0, of V contour, through said collar, adapted to receive pin e and allow the same to pass through itby the rotation of the cylinder in two directions, substantially as described.

2. The combination of the barrel B, the axial .cylinder'pin extending rearwardly therefrom,

and the groove 0, of V contour, through said collar, adapted to receive the pin e and allow the same to pass th rough it, and the spring of, projecting into said groove, substantially as described.

DAVID HALL RICE.

\Vitnesses:

O. J. TOLAND, N. P. QOKINGTON. 

